That’s another classic “viral hack” line—and it’s usually trying to push the idea that eggshells are some kind of miracle remedy (for calcium, joints, plants, or even disease). The reality is more limited.
What eggshells actually are
Eggshells are mostly:
- Calcium carbonate (~90–95%)
- Small amounts of protein and minerals
So yes—they contain calcium. But that doesn’t automatically make them useful or safe to “just consume.”
The truth about boiling eggshells
1) Safety issue (important)
Raw or poorly prepared eggshells can carry:
- Salmonella
- Dirt and contaminants
Boiling helps sanitize them, but it does not make them automatically safe to eat.
2) Calcium absorption problem
Even if cleaned and ground:
- Eggshell calcium is not easily absorbed unless finely processed
- Your body absorbs calcium better from:
- Milk, yogurt, cheese
- Fortified foods
- Medical calcium supplements (properly formulated)
3) What people falsely claim it “fixes”
Viral posts often say eggshells:
- Heal joints ❌
- Cure arthritis ❌
- Reverse bone loss ❌
- Replace supplements ❌
There is no strong clinical evidence supporting these claims.
Where eggshells can be useful
✔ In gardening
- Crushed eggshells can add calcium to soil
- May help deter some pests (limited effect)
✔ As a lab/DIY calcium source (carefully processed)
Some experimental supplements use eggshell calcium—but they are:
- Purified
- Finely milled
- Quality-controlled
Not just “boil and eat.”
